Of course. On current form, Burdisso is much better than Cordoba. But the defence that I prefer is the best one potentially (At a short term). Cordoba and Matrix got us 15 clean sheets in 01/02 I believe and that is quite a good record. They complement each other and thus I think we should give them time.
Of course the 2 of them, plus Javier Zanetti, has been playing together for so long with Inter but we have to remember that they need to adjust back to the 4-men-defence after playing 3-men-defence under Zac last season. What's more, they haven't adjust to the midfield and the new attack-till-you-die tactic. Look at the Juve defence of this season for example, they did not change their defence at all for Serie A matches this season (Zambro - Canna - Thuram - Zebina).
Off-topicly though, I would actually prefer a 2 complete central defenders rather than a classic stopper and sweeper in our team. Someone like Carvalho & Terry or Maldini & Nesta. If only we bought Mexes and Carvalho.
Handyo